Quote:
Originally Posted by 91chevyz28
The RPO label in the trunk says it is a GN. Do a search a lot of people do the vacuum set up. A couple of years ago I think GM High Tech did an article on it because the Hydro Boost fail a lot. I think I still have it, I just have to look. I am not sure about the fillers. I bought them off of someone from the Turbo forum.
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I think The gm high tech article your thinking about was the swap from a powermaster to hydroboost.